package lab02.Test02;

/**
 * Created by lenovo on 2017/10/13.
 */
public class Circle {
    double radius;
    final double PI=3.141592;
    public  double area(double radius){
        return (PI*radius*radius);
    }
    public  double girth(double radius){
        return (2*PI*radius);
    }
}
